US3928259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated butyl rubber of improved scorch characteristics
Assignee: Polysar Ltd
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Filing: 1974-11-22
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Granted: 1975-12-23
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Expires: 1994-11-22
Abstract
Abstract The scorch characteristics of halogenated butyl rubber compounds are improved by the addition of one of or a mixture of the free acid or the magnesium, aluminum, calcium or barium salts of oligomers of linoleic acid.
Inventors
- 👤 George Feniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08L; C08L21/00; C08L23/00; C08L23/26; C08L23/28; C08L23/283
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A VULCANIZABLE COMPOSITION HAVING IMPROVED SCORCH CHARACTERISTICS WHICH COMPRISE (A) A POLYMERIC COMPONENT BEING A HALOGENAED BUTYL RUBBER AND AT LEAST ONE OF NUTRAL RUBBER AND SYNTHETIC UNSATURATED RUBBERS SELECTED FROM POLYISOPRENE, POLYBUTADIENE, STYRENE-BUTADIENE POLYMERS AND ETHYLENE-PROPYLENE-DIENE POLYMERS SAID HALOGENATED BUTYL RUBBER FORMS AT LEAST 20 WEIGHT PERCENT OF SAID POLYMERIC COMPONENT AND (B) A SCORCH RETARDING AGENT SELECTED FROM AT LEAST ONE OF THE FREE ACID AND THE ALUMINUM, BARIUM, CALCIUM AND MAGNESIUM SALTS OF AN OLIGOMER OF LINOLEIC ACID, SAID SCORCH RETARDING AGENT BEING PRESENT IN AN AMOUNT FROM ABOUT 0.5 PARTS TO ABOUT 5 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYMERIC COMPONENT.
Claim 2
Dependent Claim
109 words
A VULCANIZABLE COMPOSITION HAVING IMPROVED SCORCH CHARACTERISTICS WHICH COMPRISE (A) A POLYMERIC COMPONENT BEING A HALOGENAED BUTYL RUBBER AND AT LEAST ONE OF NUTRAL RUBBER AND SYNTHETIC UNSATURATED RUBBERS SELECTED FROM POLYISOPRENE, POLYBUTADIENE, STYRENE-BUTADIENE POLYMERS AND ETHYLENE-PROPYLENE-DIENE POLYMERS SAID HALOGENATED BUTYL RUBBER FORMS AT LEAST 20 WEIGHT PERCENT OF SAID POLYMERIC COMPONENT AND (B) A SCORCH RETARDING AGENT SELECTED FROM AT LEAST ONE OF THE FREE ACID AND THE ALUMINUM, BARIUM, CALCIUM AND MAGNESIUM SALTS OF AN OLIGOMER OF LINOLEIC ACID, SAID SCORCH RETARDING AGENT BEING PRESENT IN AN AMOUNT FROM ABOUT 0.5 PARTS TO ABOUT 5 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYMERIC COMPONENT.
Claim 3
Dependent Claim
15 words
The composition of claim 1 in which the synthetic unsaturated rubber is a styrene-butadiene polymer.
Claim 4
Dependent Claim
19 words
The composition of claim 2 in which the synthetic unsaturated rubber is a styrene-butadiene polymer and an ethylene-propylene-diene polymer.
Claim 5
Dependent Claim
14 words
The composition of claim 2 in which the synthetic unsaturated rubber is a polybutadiene.
Claim 6
Dependent Claim
17 words
The composition of claim 1 in which said halogenated butyl rubber is selected from chlorobutyl and bromobutyl.
Claim 7
Dependent Claim
51 words
The composition of claim 5 in which said halogenated butyl rubber is a polymer containing, based on hydrocarbons, from 97 to 99.5 weight per cent of isobutylene and from 0.5 to 3 weight per cent of isoprene and, based on halogenated polymer, from 0.5 to 5 weight per cent of bromine.
Claim 8
Dependent Claim
51 words
The composition of claim 2 in which said halogenated butyl rubber is a polymer containing, based on hydrocarbons, from 97 to 99.5 weight per cent of isobutylene, and from 0.5 to 3 weight per cent of isoprene and, based on halogenated polymer, from 0.5 to 2 weight per cent of chlorine.
Claim 9
Dependent Claim
41 words
The composition of claim 5 in which said scorch retarding agent is the calcium salt of the dimer of linoleic acid present in an amount of from 0.75 to 2.5 parts by weight per 100 parts by weight of polymeric component.
Claim 10
Dependent Claim
41 words
The composition of claim 5 in which said scorch retarding agent is the calcium salt of the trimer of linoleic acid present in an amount of from 0.75 to 2.5 parts by weight per 100 parts by weight of polymeric component.
Claim 11
Dependent Claim
101 words
The composition of claim 5 in which said halogenated butyl rubber is a polymer containing, based on hydrocarbons, from 98 to 99 weight per cent of isobutylene and from 1 to 2 weight per cent of isoprene and, based on halogenated polymer, from 1.5 to 2.5 weight per cent of bromine, said halogenated butyl rubber forms at least 20 weight per cent of said polymeric component and said scorch retarding agent is the calcium salt of the dimer of linoleic acid present in an amount of from 0.75 to 2.5 parts by weight per 100 parts by weight of polymeric component.
References Cited (Backward Citations)
US3629171A
Cited
US3630974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |